Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/lib/Transforms/Utils/LowerInvoke.cpp

@@ -1,94 +0,0 @@
-//===- LowerInvoke.cpp - Eliminate Invoke instructions --------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This transformation is designed for use by code generators which do not yet
-// support stack unwinding.  This pass converts 'invoke' instructions to 'call'
-// instructions, so that any exception-handling 'landingpad' blocks become dead
-// code (which can be removed by running the '-simplifycfg' pass afterwards).
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Utils/LowerInvoke.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Transforms/Scalar.h"
-using namespace llvm;
-
-#define DEBUG_TYPE "lowerinvoke"
-
-STATISTIC(NumInvokes, "Number of invokes replaced");
-
-namespace {
-  class LowerInvokeLegacyPass : public FunctionPass {
-  public:
-    static char ID; // Pass identification, replacement for typeid
-    explicit LowerInvokeLegacyPass() : FunctionPass(ID) {
-      initializeLowerInvokeLegacyPassPass(*PassRegistry::getPassRegistry());
-    }
-    bool runOnFunction(Function &F) override;
-  };
-}
-
-char LowerInvokeLegacyPass::ID = 0;
-INITIALIZE_PASS(LowerInvokeLegacyPass, "lowerinvoke",
-                "Lower invoke and unwind, for unwindless code generators",
-                false, false)
-
-static bool runImpl(Function &F) {
-  bool Changed = false;
-  for (BasicBlock &BB : F)
-    if (InvokeInst *II = dyn_cast<InvokeInst>(BB.getTerminator())) {
-      SmallVector<Value *, 16> CallArgs(II->op_begin(), II->op_end() - 3);
-      // Insert a normal call instruction...
-      CallInst *NewCall =
-          CallInst::Create(II->getCalledValue(), CallArgs, "", II);
-      NewCall->takeName(II);
-      NewCall->setCallingConv(II->getCallingConv());
-      NewCall->setAttributes(II->getAttributes());
-      NewCall->setDebugLoc(II->getDebugLoc());
-      II->replaceAllUsesWith(NewCall);
-
-      // Insert an unconditional branch to the normal destination.
-      BranchInst::Create(II->getNormalDest(), II);
-
-      // Remove any PHI node entries from the exception destination.
-      II->getUnwindDest()->removePredecessor(&BB);
-
-      // Remove the invoke instruction now.
-      BB.getInstList().erase(II);
-
-      ++NumInvokes;
-      Changed = true;
-    }
-  return Changed;
-}
-
-bool LowerInvokeLegacyPass::runOnFunction(Function &F) {
-  return runImpl(F);
-}
-
-namespace llvm {
-char &LowerInvokePassID = LowerInvokeLegacyPass::ID;
-
-// Public Interface To the LowerInvoke pass.
-FunctionPass *createLowerInvokePass() { return new LowerInvokeLegacyPass(); }
-
-PreservedAnalyses LowerInvokePass::run(Function &F,
-                                       FunctionAnalysisManager &AM) {
-  bool Changed = runImpl(F);
-  if (!Changed)
-    return PreservedAnalyses::all();
-
-  return PreservedAnalyses::none();
-}
-}